ACOTYLEDONS, LICHENS. AlectOTia. 67 



B Apothecia covered ly the substance of the thallus , containing 

 a pulverulent mass. 



28. SPtLEROPHORON. 



Universal receptacle crustaceo-cartilaginous, branched, shrubby, 

 solid within. Partial recept. subglobose, sessile, terminal on 

 the branches of the thallus and formed of it, breaking with a 

 torn margin and containing within a pulverulent (black) mass 

 collected into a ball. 



1. S. coralloides, thallus palish brown, branches lateral elon- 

 gated lax divaricated and forked acuminated, apothecia sub- 

 globose, smooth. Ach. Syn. Lick. p. 267. Lichen glob if e- 

 rus, Light/, p. 887. E. B. t.l\5. 



HAB. Rocks in the Highlands and Lowlands, frequent. 



2. S. fragile, thallus greyish branched, branches dichotomous 

 short crowded fastigiate naked rounded rather obtuse, apo- 

 thecia globoso-turbinate somewhat warted. Ach. Syn. Lick, 

 p. 287. Lichen Jragilis, Light/, p. $88. E. B. t. 2474 

 (not 114, which is the following). 



HAB. Rocks in mountainous places, frequent. 



3. S. compression, thallus whitish branched, branches com- 

 pressed raniulose subfibrillose naked, apothecia subglobose de- 

 pressed and smooth above. Ach. Syn. Lich. p. 287. Lichen 

 fragilis, E. B. t. 114. 



HAB. Rocks in mountainous places, but mostly sterile. 



Div. III. HOMOTHALAMI. Lichens whose apothecia are form- 

 ed wholly of the substance of the thallus and of the same 

 colour with it. 



29. ALECTORIA. 



Universal receptacle cartilaginous, subfiliform, branched, pro- 

 strate or pendulous, within somewhat fistulose and with a 

 central thread. Partial recept. scutelliform, thick, sessile, 

 plane or convex, margined, entirely formed of the thallus, <md 

 of the same colour. 



1. A. jubata, thallus rounded somewhat shining livid brown 

 very much branched, branches filiform compressed at the axils, 

 apothecia of the same colour at length convex entire at the 

 margin. Ach. Syn. Lich. p. 291. Lichen julatus, Light/. 

 p. 891. E. B. t. 1880. 



/3. chalybeiformis, thallus and the subsimple branches fiexuose 

 or tortuose complicated rather rigid greyish black decumbent. 

 Ach. Syn. Lich. p. 291. E. B. t. 1880. L. chalybeiformis, 

 Light/, p. 892. 



HAB. Trunks of trees, especially firs, and rocks, frequent. 



This, Linnaeus tells us, occasionally supplies the rein-deer with food; 



0:2] 



